#!/usr/bin/python3
# -*-coding:utf-8 -*-
"""
自动一个dict类，用这个类定义的dict可以通过属性访问
>>> d = Dict(a=1, b=2)
>>> d['a']
1
>>> d.a
1
>>> d1 = Dict()
>>> d1['x'] = 100
>>> d1.x
100
>>> d1.y = 200
>>> d1['y']
200
>>> d2 = Dict(a=1, b=2, c='3')
>>> d2.c
'3'
>>> d2['empty']
Traceback (most recent call last):
    ...
KeyError: 'empty'
>>> d2.empty
Traceback (most recent call last):
    ...
AttributeError: 'Dict' object has no attribute 'empty'
"""


class Dict(dict):
    def __init__(self, **kw):
        super(Dict, self).__init__(**kw)

    def __getattr__(self, key):
        try:
            return self[key]
        except KeyError:
            # print(e)
            # print(r"'Dict' object has no attribute '%s'" % key)
            raise AttributeError(r"'Dict' object has no attribute '%s'" % key)

    def __setattr__(self, key, value):
        self[key] = value


if __name__ == '__main__':
    import doctest
    doctest.testmod()
